For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningAir Conditioning Compressor Replacement (1.6L LDE, LXV, and 1.8L 2H0)
Preliminary Procedures
Recover the refrigerant. Refer to Refrigerant Rec . overy and
Recharging.
Remove drive belt. Refer to Drive Belt Replacement.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Disconnect the A/C compressor electrical connector
Re ...
Radio Reception
Frequency interference and static can occur during normal radio reception if
items such as phone chargers, vehicle convenience accessories, and external electronic
devices are plugged into the accessory power outlet. If there is interference or
static, unplug the item from the accessory power ...
OnStar Additional Information
Transferring Service
Press to request account transfer
eligibility information. The Advisor can assist in canceling or removing account
information. If OnStar receives information that vehicle ownership has changed,
OnStar may send a voice message to the vehicle, requesting updated account i ...